Germ Cell Movements and Sex Differentiation of the Gonads in the Drosophila Embryo.
Germ Cell Movements and Sex Differentiation of the Gonads in the Drosophila Embryo.
复制标题
果蝇胚胎中生殖细胞的运动和性腺的性别分化。
DOI：
10.1073/pnas.27.10.484
复制
发表时间：
1941
影响因子：
11.1
通讯作者：
B. Sonnenblick
中科院分区：
文献类型：
--
作者：
B. Sonnenblick
cleus opposite the chromosomes are very interesting, but of questionable significance. If, as Cleveland asserts (op. cit., also, Science, 81, 598 (1935)), all of these fibres are merely astral rays, then it is not surprising that they are visible in the living organism. Moreover, the homology of such a bizarre achromatic apparatus with that of multicellular organisms is by no means clear. 6 See figures 4 and 7 in: Blaf, K., Zeits. indukt. Abstamm. Vererb., Supplementbd., 1, 402 (1928). 7Das, R. S., Zeits. Zellf., Abt. A, 30, 36 (1939). 8 Cooper, K. W., Chromosoma, 1, 51 (1939). The figures of this paper will be found helpful in following the present account. 9 The "refringent materials" in fixed preparations stain selectively, and thus may be shown not to be chromosomoids. They are not considered in my earlier account, for they showed only under certain fixation procedures. It was the attempt to ascertain whether these materials exist in the living egg that led to the discovery of the visibility of the spindle fibres.
